I'm not affiliated with Trackem but have been involved with quite a few solutions using it. The main idea for Trackem is a fleet tracking tool, all a companies employees would carry a gps blackberry or cell phone with trackem on it and then the main dispatcher can see where everyone is on a map.

The TrackemPlus adds some client side features like what restaruants or other landmarks are close to you. You can also get a map of your current location.

Trackem.ca - GPS, Cell Phone, and Mobile Internet Location Services